Multiple choice

Sandeep present age is four times his son's age and four- seventh of his father's present age. The average of the present age of all three of them is 32 years. What is the difference between the Sandeep's son's age and Sandeeps's father's age after 10 years?

  1. 44

  2. 50

  3. 48

  4. 56

  5. Cannot be determined

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let son's age = x. Then Sandeep = 4x and father = 7x (since Sandeep is 4/7 of father). Their average is (x + 4x + 7x)/3 = 32, so 12x = 96 and x = 8. Son is 8, father is 56. After 10 years: son = 18, father = 66. Difference = 66 - 18 = 48.